Device for threading pipes



(Model.)

J. MILLER. DEVIGE FOR THREADING PIPES.

No. 243,941; Patented July 5, 1881.

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UNITED STATES PATENT OFFICE...

JOHN MILLER, OF OAMBRIDGEPORT, MASSACHUSETTS.

DEVICE FOR THREADING PIPES.

SPECIFICATION forming part of Letters Patent No. 243,941, dated. July '5, 1881.

7 Application filed May 24, 1881. (Model) To all whom it may concern Be it known that I, J ornv MILLER, of Gambridgeport, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Devices for Threading Pipes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in devices for threading pipes and other similar objects; and it consists in the combination of a handle having an opening through one end, a frame to receive the cutter, and provided with a ratchet upon its surface, and a reversible pawl carrying a spring, whereby either a right or a left handed thread may be cut, as

will be more fully described hereinafter.

The object of my invention is to provide a machine for cutting thread upon pipes, round bars of iron, and other similar objects, and which is so constructed that a right or a left handed thread can be cut with equal facility by simply reversing the motion of the diecarrier and turning the handlein the opposite direction.

Figure l is a plan view of my invention. Fig. 2 is a vertical longitudinal section of the same.

A represents a handle of any desired construction, and which has an opening made through its largerend. Passed down through this opening is the pipe-like portion 0 of the frame D, in which the die is placed. This frame D has the double ratchet E formed in its surface, and this ratchet comes in direct contact with the top of the lever, so that the double-actin g pawl F can be made to engage therewith. This frame for holding the cutters is secured to the lever by having the collar G passed over the pipe-like portion of the frame, so as to bear against the under side of the lever, and then the collar is secured in position by means of screws or other suitable devices. In this position the frame and the lever are secured together; but theframe can be freely revolved in either direction, according as it is desired to cut a left or a right handed screw. When it is desired that the frame shall be turned toward the left the reversible pawl, having the spring J secured to its side, is turned so that its inner end will bear against the ratchet, and then the keeper L springs into place, so as to bear against the outer end of the spring, as shown. This keeper is made of a spring-wire, of the shape shown, which can be pressed down upon the lever, so that the pawl can sweep over its top. As soon as the pawl has been moved over to the other side and the keeper is released it snaps up into position again. In this position the reversible pawl is held pressed against the ratchet in such a manner that the frame can be freely forced around in one direction, but cannot turn in the other. When it is desired to have the frame revolve in the opposite direction the keeper is depressed and the pawl is reversed, and then the frame can be as freely revolved in the opposite direction.

The frame D is provided with a pivoted cover, so that the cover can be moved back at any time, and any suitable thread-cuttin g deis made to revolve the cutter will be made to cut the thread in the surface of the pipe, bolt, or iron bar. Any die or cutter that may be preferred may be used in connection with thisframe, as I do not limit myself to any particular construction in this respect.

This device is designed especially to work where there is but little space, and in corners, or holes madein the ground, and to cut threads upon pipes and other such things without having to remove them from their positions.

Having thus described my invention, I claim- The combination of a handle, A, having an opening through one end, the frame D, provided with a removable cover, a pipe-like extension, (J, and the ratchet E, with the reversible pawl F, spring J, keeper L, and collar, the parts being combined and arranged to operate substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN MILLER.

Witnesses:

FRANCIS L. PRATT, CHARLES A. GAY.

vice can be placed in it, and when the frame 

